diff --git a/metropolis/installer/test/main.go b/metropolis/installer/test/main.go
index 3963654..7954c1d 100644
--- a/metropolis/installer/test/main.go
+++ b/metropolis/installer/test/main.go
@@ -268,7 +268,7 @@
 	if err := checkEspContents(storage); err != nil {
 		t.Error(err.Error())
 	}
-	//storage.File.Close()
+	storage.File.Close()
 	// Run QEMU again. Expect TestOS to launch successfully.
 	expectedOutput = "_TESTOS_LAUNCH_SUCCESS_"
 	time.Sleep(time.Second)